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Finding the Fourth Proportional to 319,265.40, 478,830.90 and 161,345.40

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Solution

The fourth proportional to 319,265.40, 478,830.90 and 161,345.40 is: 241,984.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,265.40 : 478,830.90 = 161,345.40 : x
  2. Step 2: Convert to fraction form
    319,265.40/478,830.90 = 161,345.40/x
  3. Step 3: Cross multiply
    319,265.40x = 478,830.90 × 161,345.40
  4. Step 4: Simplify right side
    319,265.40x = 77,257,163,092.86
  5. Step 5: Solve for x
    x = 77,257,163,092.86/319,265.40
  6. Step 6: Final answer
    x = 241,984.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.